
        // {/* 拖动滚动条或滚动鼠标轮 */}
        window.onscroll=function(){
            if(document.body.scrollTop||document.documentElement.scrollTop){
                document.getElementById('rTop').style.display="block"
            }else{
            document.getElementById('rTop').style.display="none"
           // button1style.cursor="hand"
        }
        }
        // 点击“返回顶部”按钮
        function toTop(){
            window.scrollTo('0','0');
            button1style = document.getElementById('rTop').style;
            button1style.display="none"
        button1style.cursor="hand"
            document.getElementById('rTop').style.display="none"
        }